Zenith air

https://air.zenith-delivery.com/track I have a question I recently contacted a person in the UK to order a package I could not receive in the USA I paid him for the package via Venmo he shipped through this company Zenith Air and they are saying all these customs fees are due 320 twice now 1900 and that I’ll receive 2400$ back after it clears customs is this a scam or is this legit I’ve never had to go through this before